.footer{
    position: fixed;left: 0;bottom: 0;width: 100%;height: 88px;align-items: center;background-color: #444;color: #fff;
    .btn-main{width: 250px;height: 88px;line-height: 88px; background-color: #ec6b32;color: #fff;font-size: 32px;text-align: center;}
}
